util/crossgcc/buildgcc

#!/bin/sh
#
# Copyright (C) 2008-2010 by coresystems GmbH
# written by Patrick Georgi <patrick.georgi@coresystems.de> and
#            Stefan Reinauer <stefan.reinauer@coresystems.de>
#
# Copyright (C) 2011 by Sage Electronic Engineering
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#

cd $(dirname $0)

CROSSGCC_DATE="August 31st, 2016"
CROSSGCC_VERSION="1.43"
CROSSGCC_COMMIT=$( git describe )

# default settings
PACKAGE=GCC
TARGETDIR=$(pwd)/xgcc
TARGETARCH=i386-elf
LANGUAGES=c
DESTDIR=
SAVETEMPS=0
SKIPPYTHON=1
BOOTSTRAP=0

# GCC toolchain version numbers
GMP_VERSION=6.1.0
MPFR_VERSION=3.1.4
MPC_VERSION=1.0.3
LIBELF_VERSION=0.8.13
GCC_VERSION=5.3.0
GCC_AUTOCONF_VERSION=2.69
BINUTILS_VERSION=2.26.1
GDB_VERSION=7.11
IASL_VERSION=20160831
PYTHON_VERSION=3.5.1
EXPAT_VERSION=2.1.1
# CLANG version number
CLANG_VERSION=3.8.0
MAKE_VERSION=4.2.1

# GCC toolchain archive locations
# These are sanitized by the jenkins toolchain test builder, so if
# a completely new URL is added here, it probably needs to be added
# to the jenkins build as well, or the builder won't download it.
GMP_ARCHIVE="http://ftpmirror.gnu.org/gmp/gmp-${GMP_VERSION}.tar.xz"
MPFR_ARCHIVE="http://ftpmirror.gnu.org/mpfr/mpfr-${MPFR_VERSION}.tar.xz"
MPC_ARCHIVE="http://ftpmirror.gnu.org/mpc/mpc-${MPC_VERSION}.tar.gz"
LIBELF_ARCHIVE="http://www.mr511.de/software/libelf-${LIBELF_VERSION}.tar.gz"
GCC_ARCHIVE="http://ftpmirror.gnu.org/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.bz2"
BINUTILS_ARCHIVE="http://ftpmirror.gnu.org/binutils/binutils-${BINUTILS_VERSION}.tar.bz2"
GDB_ARCHIVE="http://ftpmirror.gnu.org/gdb/gdb-${GDB_VERSION}.tar.xz"
IASL_ARCHIVE="https://acpica.org/sites/acpica/files/acpica-unix2-${IASL_VERSION}.tar.gz"
PYTHON_ARCHIVE="http://www.python.org/ftp/python/${PYTHON_VERSION}/Python-${PYTHON_VERSION}.tar.xz"
EXPAT_ARCHIVE="http://downloads.sourceforge.net/sourceforge/expat/expat-${EXPAT_VERSION}.tar.bz2"
# CLANG toolchain archive locations
LLVM_ARCHIVE="http://llvm.org/releases/${CLANG_VERSION}/llvm-${CLANG_VERSION}.src.tar.xz"
CFE_ARCHIVE="http://llvm.org/releases/${CLANG_VERSION}/cfe-${CLANG_VERSION}.src.tar.xz"
CRT_ARCHIVE="http://llvm.org/releases/${CLANG_VERSION}/compiler-rt-${CLANG_VERSION}.src.tar.xz"
CTE_ARCHIVE="http://llvm.org/releases/${CLANG_VERSION}/clang-tools-extra-${CLANG_VERSION}.src.tar.xz"
MAKE_ARCHIVE="http://ftpmirror.gnu.org/make/make-${MAKE_VERSION}.tar.bz2"

ALL_ARCHIVES="$GMP_ARCHIVE $MPFR_ARCHIVE $MPC_ARCHIVE $LIBELF_ARCHIVE \
	$GCC_ARCHIVE $BINUTILS_ARCHIVE $GDB_ARCHIVE $IASL_ARCHIVE \
	$PYTHON_ARCHIVE $EXPAT_ARCHIVE $LLVM_ARCHIVE $CFE_ARCHIVE \
	$CRT_ARCHIVE $CTE_ARCHIVE $MAKE_ARCHIVE"

# GCC toolchain directories
GMP_DIR="gmp-${GMP_VERSION}"
MPFR_DIR="mpfr-${MPFR_VERSION}"
MPC_DIR="mpc-${MPC_VERSION}"
LIBELF_DIR="libelf-${LIBELF_VERSION}"
GCC_DIR="gcc-${GCC_VERSION}"
BINUTILS_DIR="binutils-${BINUTILS_VERSION}"
GDB_DIR="gdb-${GDB_VERSION}"
IASL_DIR="acpica-unix2-${IASL_VERSION}"
PYTHON_DIR="Python-${PYTHON_VERSION}"
EXPAT_DIR="expat-${EXPAT_VERSION}"
# CLANG toolchain directories
LLVM_DIR="llvm-${CLANG_VERSION}.src"
CFE_DIR="cfe-${CLANG_VERSION}.src"
CRT_DIR="compiler-rt-${CLANG_VERSION}.src"
CTE_DIR="clang-tools-extra-${CLANG_VERSION}.src"
MAKE_DIR="make-${MAKE_VERSION}"

unset MAKELEVEL MAKEFLAGS

red='\033[0;31m'
RED='\033[1;31m'
green='\033[0;32m'
GREEN='\033[1;32m'
blue='\033[0;34m'
BLUE='\033[1;34m'
cyan='\033[0;36m'
CYAN='\033[1;36m'
NC='\033[0m' # No Color

UNAME=$(uname | grep -iq cygwin && echo Cygwin || uname)
HALT_FOR_TOOLS=0

normalize_dirs()
{
	mkdir -p $DESTDIR$TARGETDIR/lib
	test -d $DESTDIR$TARGETDIR/lib32 && mv $DESTDIR$TARGETDIR/lib32/* $DESTDIR$TARGETDIR/lib
	test -d $DESTDIR$TARGETDIR/lib64 && mv $DESTDIR$TARGETDIR/lib64/* $DESTDIR$TARGETDIR/lib
	rmdir -p $DESTDIR$TARGETDIR/lib32 $DESTDIR$TARGETDIR/lib64

	perl -pi -e "s,/lib32,/lib," $DESTDIR$TARGETDIR/lib/*.la
	perl -pi -e "s,/lib64,/lib," $DESTDIR$TARGETDIR/lib/*.la
}

please_install()
{
	HALT_FOR_TOOLS=1
	test -r /etc/os-release && . /etc/os-release
	case "$ID_LIKE" in
	debian) solution="sudo apt-get install $1" ;;
	suse) solution="sudo zypper install $1" ;;
	*) solution="using your OS packaging system" ;;
	esac

	printf "${RED}ERROR:${red} Missing tool: Please install \'$1\'. (eg $solution)${NC}\n" >&2
	if [ -n "$2" ]; then
		printf "${RED}ERROR:${red}               or install \'$2\'.${NC}\n" >&2
	fi
}

searchtool()
{
	# $1 short name
	# $2 search string
	# $3 soft fail if set
	# $4 alternative package to install on failure
	# result: file name of that tool on stdout
	#         or no output if nothing suitable was found
	search=GNU
	if [ -n "$2" ]; then
		search="$2"
	fi
	for i in "$1" "g$1" "gnu$1"; do
		if [ -x "$(which $i 2>/dev/null)" ]; then
			if [ "$(cat /dev/null | $i --version 2>&1 | grep -c "$search")" \
			    -gt 0 ]; then
				echo $i
				return
			fi
		fi
	done
	# A workaround for OSX 10.9 and some BSDs, whose nongnu
	# patch and tar also work.
	if [ $UNAME = "Darwin" -o $UNAME = "FreeBSD" -o $UNAME = "NetBSD" -o $UNAME = "OpenBSD" ]; then
		if [ "$1" = "patch" -o "$1" = "tar" ]; then
			if [ -x "$(which $1 2>/dev/null)" ]; then
				echo $1
				return
			fi
		fi
	fi
	if echo $1 | grep -q "sum" ; then
		algor=$(echo $1 | sed -e 's,sum,,')
		if [ -x "$(which $1 2>/dev/null)" ]; then
			#xxxsum [file]
			echo $1
			return
		elif [ -x "$(which $algor 2>/dev/null)" ]; then
			#xxx [file]
			echo $algor
			return
		elif [ -x "$(which openssl 2>/dev/null)" ]; then
			#openssl xxx [file]
			echo openssl $algor
			return
		elif [ -x "$(which cksum 2>/dev/null)" ]; then
			#cksum -a xxx [file]
			#cksum has special options in NetBSD. Actually, NetBSD will use the second case above.
			echo "buildgcc" | cksum -a $algor > /dev/null 2>/dev/null && \
			echo cksum -a $algor
			return
		fi
	fi

	[ -z "$3" ] && please_install $1 $4
	false
}

# Run a compile check of the specified library option to see if it's installed
check_for_library() {
	local LIBRARY_FLAGS=$1
	local LIBRARY_PACKAGES="$2"
	local LIBTEST_FILE=.libtest

	echo "int main(int argc, char **argv) { (void) argc; (void) argv; return 0; }" > "${LIBTEST_FILE}.c"

	cc $CFLAGS $LIBRARY_FLAGS "${LIBTEST_FILE}.c" -o "${LIBTEST_FILE}" >/dev/null 2>&1 || \
		please_install "$LIBRARY_PACKAGES"
	rm -rf "${LIBTEST_FILE}.c" "${LIBTEST_FILE}"
}

buildcc_major() {
	echo "${GCC_VERSION}" | cut -d. -f1
}

buildcc_version() {
	echo "${GCC_VERSION}" | cut -d. -f1-2
}

hostcc_major() {
	(echo __GNUC__ | ${CC} -E - 2>/dev/null || echo 0) | tail -1
}

hostcc_minor() {
	(echo __GNUC_MINOR__ | ${CC} -E - 2>/dev/null || echo 0) | tail -1
}

hostcc_version() {
	printf "%d.%d" "$(hostcc_major)" "$(hostcc_minor)"
}

hostcc_has_gnat1() {
	[ -x "$(${CC} -print-prog-name=gnat1)" ]
}

ada_requested() {
	echo "${LANGUAGES}" | grep -q '\<ada\>'
}

check_gnat() {
	if hostcc_has_gnat1; then
		if [ "$(hostcc_version)" != "$(buildcc_version)" -a "${BOOTSTRAP}" != "1" ]; then
			printf "\n${RED}ERROR:${red} Building the Ada compiler (gnat $(buildcc_version)) "
			printf "with a different host compiler\n       version ($(hostcc_version)) "
			printf "requires bootstrapping (-b).${NC}\n\n"
			HALT_FOR_TOOLS=1
		fi
	fi
}

check_cc() {
	if is_package_enabled "GCC"; then
		if [ "$(hostcc_major)" != "$(buildcc_major)" -a "${BOOTSTRAP}" != "1" ]; then
			printf "\n${red}warning: Building GCC $(buildcc_version) with a different major "
			printf "version ($(hostcc_version)).\n"
			printf "         Bootstrapping (-b) is recommended.${NC}\n\n"
		fi
		if ada_requested; then
			check_gnat
		fi
	fi
}

check_sum() {
	test -z "$CHECKSUM" || \
	test "$(cat sum/$1.cksum 2>/dev/null | sed -e 's@.*\([0-9a-f]\{40,\}\).*@\1@')" = \
	"$($CHECKSUM tarballs/$1 2>/dev/null | sed -e 's@.*\([0-9a-f]\{40,\}\).*@\1@')"
}

compute_sum() {
	test ! -f sum/$1.cksum && test -f tarballs/$1 && \
	(test -z "$CHECKSUM" || $CHECKSUM tarballs/$1 > sum/$1.cksum ) && \
	printf "(checksum created. ${RED}Note. Please upload sum/$1.cksum if the corresponding archive is upgraded.)${NC}"
}

download_showing_percentage() {
	url=$1
	printf " ..${red}  0%%"
	wget --no-check-certificate $url 2>&1 | while read line; do
		echo $line | grep -o "[0-9]\+%" | awk '{printf("\b\b\b\b%4s", $1)}'
	done
	printf "${NC}"
}

download() {
	package=$1
	archive="$(eval echo \$$package"_ARCHIVE")"

	FILE=$(basename $archive)
	printf " * $FILE "

	if test -f tarballs/$FILE && check_sum $FILE ; then
		printf "(cached)"
	else
		printf "(downloading from $archive)"
		rm -f tarballs/$FILE
		cd tarballs
		download_showing_percentage $archive
		cd ..
		compute_sum $FILE
	fi

	if [ ! -f tarballs/$FILE ]; then
		printf "\n${RED}Failed to download $FILE.${NC}\n"
		exit 1
	fi
	printf "\n"
}

unpack_and_patch() {
	package=$1
	archive="$(eval echo \$$package"_ARCHIVE")"
	dir="$(eval echo \$$package"_DIR")"
	test -d ${dir} && test -f ${dir}/.unpack_success || (
		printf " * $(basename $archive)\n"
		FLAGS=zxf
		suffix=$(echo $archive | sed 's,.*\.,,')
		if [ "$suffix" = "gz" ] && [ -n "$PIGZ" ]; then FLAGS="-I pigz -xf"
		elif [ "$suffix" = "gz" ]; then FLAGS=zxf
		elif [ "$suffix" = "bz2" ] && [ -n "$LBZIP2" ]; then FLAGS="-I lbzip2 -xf"
		elif [ "$suffix" = "bz2" ]; then FLAGS=jxf
		elif [ "$suffix" = "xz" ]; then FLAGS="--xz -xf"
		elif [ "$suffix" = "lzma" ]; then FLAGS="--lzma -xf"
		fi
		$TAR $FLAGS tarballs/$(basename $archive)
		for patch in patches/${dir}_*.patch; do
			test -r $patch || continue
			printf "   o $(basename $patch)\n"
			(cd ${dir} && $PATCH -s -N -p1 <../${patch}) || {
				printf "\n${RED}Failed $patch.${NC}\n"
				exit 1
			}
		done
		touch ${dir}/.unpack_success
	)
}

fn_exists()
{
	type $1 >/dev/null 2>&1
}

is_package_enabled()
{
	echo "$PACKAGES" |grep -q "\<$1\>"
}

package_uses_targetarch()
{
	if [ "$1" = "GCC" ] || [ "$1" = "GDB" ] || [ "$1" = "BINUTILS" ]; then
		true
	else
		false
	fi
}

generic_build()
{
	package=$1
	host_target=$2
	builddir=$3
	success=$4

	fn_exists build_$package || return

	version="$(eval echo \$$package"_VERSION")"

	mkdir -p "$builddir"

	if [ -f "$success" ]; then
		printf "Skipping $package as it is already built\n"
	else
		printf "Building $package $version ... "
		DIR="$PWD"
		cd "$builddir"
		rm -f .failed
		build_${package} $host_target > build.log 2>&1
		cd "$DIR"
		if [ ! -f "$builddir/.failed" ]; then
			touch "$success";
		else
			printf "${RED}failed${NC}. Check $builddir/build.log.\n"
			exit 1
		fi
		printf "${green}ok${NC}\n"
	fi
}

build_for_host()
{
	generic_build $1 host build-$1 "${TARGETDIR}/.$1.success"
}

build_for_target()
{
	generic_build $1 target build-${TARGETARCH}-$1 "${TARGETDIR}/.${TARGETARCH}-$1.success"
}

build()
{
	if package_uses_targetarch $1; then
		if [ $BOOTSTRAP -eq 1 -a ! -f "${TARGETDIR}/.GCC.success" ]; then
			build_for_host GCC
		fi
		build_for_target $1
	else
		build_for_host $1
	fi
}

quit()
{
	printf "${NC}Stop\n"
	exit 1
}

cleanup()
{
	if [ $SAVETEMPS -ne 0 ]; then
		printf "Leaving temporary files around... ${green}ok${NC}\n"
		return
	fi

	printf "Cleaning up temporary files... "
	for package in $PACKAGES; do
		rm -rf build-${TARGETARCH}-$package build-$package $(eval echo \$$package"_DIR")
	done
	rm -f getopt
	printf "${green}ok${NC}\n"
}

myhelp()
{
	printf "Usage: $0 [-V] [-c] [-p <platform>] [-d <target directory>] [-D <dest dir>] [-C] [-G] [-S]\n"
	printf "       $0 [-V|--version]\n"
	printf "       $0 [-h|--help]\n\n"

	printf "Options:\n"
	printf "    [-V|--version]                print version number and exit\n"
	printf "    [-h|--help]                   print this help and exit\n"
	printf "    [-c|--clean]                  remove temporary files before build\n"
	printf "    [-t|--savetemps]              don't remove temporary files after build\n"
	printf "    [-y|--ccache]                 Use ccache when building cross compiler\n"
	printf "    [-n|--nocolor]                don't print color codes in output\n"
	printf "    [-u|--urls]                   print the urls for all packages\n"
	printf "    [-j|--jobs <num>]             run <num> jobs in parallel in make\n"
	printf "    [-s]--supported <tool>        print supported version of a tool\n"
	printf "    [-d|--directory <target dir>] target directory to install cross compiler to\n"
	printf "        (defaults to $TARGETDIR)\n\n"
	printf "    [-D|--destdir <dest dir>]     destination directory to install cross compiler to\n"
	printf "                                  (for RPM builds, default unset)\n"
	printf "    [-P|--package <package>]      Build a specific package: GCC, CLANG, IASL, GDB\n"
	printf "                                  (defaults to $PACKAGE)\n"
	printf "GCC specific options:\n"
	printf "    [-b|--bootstrap]              bootstrap the host compiler before building\n"
	printf "                                  the cross compiler\n"
	printf "    [-p|--platform <platform>]    target platform to build cross compiler for\n"
	printf "                                  (defaults to $TARGETARCH)\n"
	printf "    [-l|--languages <languages>]  comma separated list of target languages\n"
	printf "                                  (defaults to $LANGUAGES)\n"
	printf "GDB specific options:\n"
	printf "    [-p|--platform <platform>]    target platform to build cross compiler for\n"
	printf "                                  (defaults to $TARGETARCH)\n"
	printf "    [-S|--scripting]              build scripting support for GDB\n\n"
	printf "Platforms for GCC & GDB:\n"
	printf "    x86_64 i386-elf i386-mingw32 mipsel-elf riscv-elf arm aarch64\n"
	printf "    powerpc64le-linux-gnu nds32le-elf\n\n"
}

printversion() {
	printf "${blue}Welcome to the ${red}coreboot${blue} cross toolchain builder v$CROSSGCC_VERSION ($CROSSGCC_DATE)${NC}\n\n"
}

myversion()
{
	printversion

	cat << EOF
Copyright (C) 2008-2010 by coresystems GmbH
Copyright (C) 2011 by Sage Electronic Engineering

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

EOF
}

have_hostcflags_from_gmp() {
	grep -q __GMP_CFLAGS $DESTDIR$TARGETDIR/include/gmp.h >/dev/null 2>&1
}

set_hostcflags_from_gmp() {
	# Now set CFLAGS to match GMP CFLAGS but strip out -pedantic
	# as GCC 4.6.x fails if it's there.
	export HOSTCFLAGS="$(grep __GMP_CFLAGS $DESTDIR$TARGETDIR/include/gmp.h |cut -d\" -f2 |\
	    sed s,-pedantic,,)"
}

build_GMP() {
	CC="$CC" ../${GMP_DIR}/configure --disable-shared --enable-fat \
		--prefix=$TARGETDIR $OPTIONS \
		|| touch .failed
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	normalize_dirs

	set_hostcflags_from_gmp
}

build_MPFR() {
	test $UNAME = "Darwin" && CFLAGS="$CFLAGS -force_cpusubtype_ALL"
	CC="$CC" ../${MPFR_DIR}/configure --disable-shared --prefix=$TARGETDIR \
		--infodir=$TARGETDIR/info \
		--with-gmp=$DESTDIR$TARGETDIR CFLAGS="$HOSTCFLAGS" || \
		touch .failed
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	normalize_dirs

	# work around build problem of libgmp.la
	if [ "$DESTDIR" != "" ]; then
	    perl -pi -e "s,$DESTDIR,," $DESTDIR$TARGETDIR/libgmp.la
	fi
}

build_MPC() {
	CC="$CC" ../${MPC_DIR}/configure --disable-shared --prefix=$TARGETDIR \
		--infodir=$TARGETDIR/info --with-mpfr=$DESTDIR$TARGETDIR \
		--with-gmp=$DESTDIR$TARGETDIR CFLAGS="$HOSTCFLAGS" || \
		touch .failed
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	normalize_dirs
}

build_LIBELF() {
	CC="$CC" CFLAGS="$HOSTCFLAGS" libelf_cv_elf_h_works=no \
	../${LIBELF_DIR}/configure --disable-shared --prefix=$TARGETDIR \
		--infodir=$TARGETDIR/info CFLAGS="$HOSTCFLAGS" || touch .failed
	$MAKE $JOBS || touch .failed
	$MAKE install prefix=$DESTDIR$TARGETDIR || touch .failed

	normalize_dirs
}

build_BINUTILS() {
	if [ $TARGETARCH == "x86_64-elf" ]; then
		ADDITIONALTARGET=",i386-elf"
	fi
	CC="$CC" ../binutils-${BINUTILS_VERSION}/configure --prefix=$TARGETDIR \
		--target=${TARGETARCH} --enable-targets=${TARGETARCH}${ADDITIONALTARGET} \
		--disable-werror --disable-nls --enable-lto --enable-gold \
		--enable-interwork --enable-multilib \
		--enable-plugins --enable-multilibs CFLAGS="$HOSTCFLAGS" || touch .failed
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed
}

bootstrap_GCC() {
	CC="$CC" \
		CFLAGS="$HOSTCFLAGS" \
		CFLAGS_FOR_BUILD="$HOSTCFLAGS" \
		CFLAGS_FOR_TARGET="$HOSTCFLAGS -fPIC" \
		CXXFLAGS="$HOSTCFLAGS" \
		CXXFLAGS_FOR_BUILD="$HOSTCFLAGS" \
		CXXFLAGS_FOR_TARGET="$HOSTCFLAGS -fPIC" \
		../gcc-${GCC_VERSION}/configure \
		--prefix=$TARGETDIR --libexecdir=$TARGETDIR/lib \
		--enable-bootstrap \
		--disable-werror --disable-nls \
		--disable-shared --disable-multilib \
		--disable-libssp --disable-libquadmath --disable-libcc1 \
		${GCC_OPTIONS} --enable-languages="${LANGUAGES}" \
		--with-gmp=$DESTDIR$TARGETDIR --with-mpfr=$DESTDIR$TARGETDIR \
		--with-mpc=$DESTDIR$TARGETDIR --with-libelf=$DESTDIR$TARGETDIR \
		--with-pkgversion="coreboot bootstrap v$CROSSGCC_VERSION $CROSSGCC_DATE" \
		&& \
	$MAKE $JOBS BOOT_CFLAGS="$HOSTCFLAGS" BUILD_CONFIG="" bootstrap && \
	$MAKE	install-gcc \
		install-target-libgcc \
		maybe-install-target-libada \
		maybe-install-target-libstdc++-v3 \
		DESTDIR=$DESTDIR && \
	ln -s gcc $DESTDIR$TARGETDIR/bin/cc || touch .failed
}

build_cross_GCC() {
	# Work around crazy code generator in GCC that confuses CLANG.
	$CC --version | grep clang >/dev/null 2>&1 && \
		HOSTCFLAGS="$HOSTCFLAGS -fbracket-depth=1024"

	# GCC does not honor HOSTCFLAGS at all. CFLAGS are used for
	# both target and host object files.
	# There's a work-around called CFLAGS_FOR_BUILD and CFLAGS_FOR_TARGET
	# but it does not seem to work properly. At least the host library
	# libiberty is not compiled with CFLAGS_FOR_BUILD.
	# Also set the CXX version of the flags because GCC is now compiled
	# using C++.
	CC="$CC" CFLAGS_FOR_TARGET="-O2 -Dinhibit_libc" CFLAGS="$HOSTCFLAGS" \
		CFLAGS_FOR_BUILD="$HOSTCFLAGS" CXXFLAGS="$HOSTCFLAGS" \
		CXXFLAGS_FOR_BUILD="$HOSTCFLAGS" ../gcc-${GCC_VERSION}/configure \
		--prefix=$TARGETDIR --libexecdir=$TARGETDIR/lib \
		--target=${TARGETARCH} --disable-werror --disable-shared \
		--enable-lto --enable-plugins --enable-gold --enable-ld=default \
		--disable-libssp --disable-bootstrap --disable-nls \
		--disable-libquadmath --without-headers \
		--disable-threads \
		--enable-interwork --enable-multilib --enable-targets=all \
		--disable-libatomic --disable-libcc1 --disable-decimal-float \
		${GCC_OPTIONS} --enable-languages="${LANGUAGES}" \
		--with-system-zlib \
		--with-gmp=$DESTDIR$TARGETDIR --with-mpfr=$DESTDIR$TARGETDIR \
		--with-mpc=$DESTDIR$TARGETDIR --with-libelf=$DESTDIR$TARGETDIR \
		--with-pkgversion="coreboot toolchain v$CROSSGCC_VERSION $CROSSGCC_DATE" \
		|| touch .failed
	$MAKE $JOBS CFLAGS_FOR_BUILD="$HOSTCFLAGS" all-gcc || touch .failed
	$MAKE install-gcc DESTDIR=$DESTDIR || touch .failed

	if [ "$(echo $TARGETARCH | grep -c -- -mingw32)" -eq 0 ]; then
		$MAKE $JOBS CFLAGS_FOR_BUILD="$HOSTCFLAGS" all-target-libgcc || touch .failed
		$MAKE install-target-libgcc DESTDIR=$DESTDIR || touch .failed
	fi
}

build_GCC() {
	if [ "$1" = host ]; then
		bootstrap_GCC
	else
		build_cross_GCC
	fi
}

build_EXPAT() {
	CC="$CC" CFLAGS="$HOSTCFLAGS" ../${EXPAT_DIR}/configure --disable-shared \
		--prefix=$TARGETDIR || touch .failed
	$MAKE || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	normalize_dirs
}

build_PYTHON() {
	CC="$CC" CFLAGS="$HOSTCFLAGS" ../${PYTHON_DIR}/configure --prefix=$TARGETDIR \
		|| touch .failed
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	normalize_dirs
}

build_GDB() {
	export PYTHONHOME=$DESTDIR$TARGETDIR
	if [ $(uname) != "FreeBSD" -a $(uname) != "NetBSD" ]; then
		LIBDL="-ldl"
	fi
	LDFLAGS="-Wl,-rpath,\$\$ORIGIN/../lib/ -L$DESTDIR$TARGETDIR/lib \
		 -lpthread $LIBDL -lutil" \
	CC="$CC" CFLAGS="$HOSTCFLAGS -I$DESTDIR$TARGETDIR/include" \
	../${GDB_DIR}/configure --prefix=$TARGETDIR \
		--target=${TARGETARCH} --disable-werror --disable-nls
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed
}

build_IASL() {
	RDIR=$PWD
	cd ../$IASL_DIR/generate/unix
	CFLAGS="$HOSTCFLAGS"
	HOST="_LINUX"
	test $UNAME = "Darwin" && HOST="_APPLE"
	test $UNAME = "FreeBSD" && HOST="_FreeBSD"
	test $UNAME = "Cygwin" && HOST="_CYGWIN"
	HOST="$HOST" OPT_CFLAGS="-O -D_FORTIFY_SOURCE=2 -D COREBOOT_TOOLCHAIN_VERSION='\"coreboot toolchain v$CROSSGCC_VERSION $CROSSGCC_DATE\"' " CFLAGS="$CFLAGS" $MAKE CC="$CC" iasl || touch $RDIR/.failed
	rm -f $DESTDIR$TARGETDIR/bin/iasl || touch $RDIR/.failed
	cp bin/iasl $DESTDIR$TARGETDIR/bin || touch $RDIR/.failed
}

build_LLVM() {
	cd ..
	ln -sf $PWD/$CFE_DIR  $LLVM_DIR/tools/clang
	ln -sf $PWD/$CTE_DIR  $LLVM_DIR/tools/clang/tools/extra
	ln -sf $PWD/$CRT_DIR  $LLVM_DIR/projects/compiler-rt
	cd -

	$CMAKE -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=$DESTDIR$TARGETDIR \
		-DCLANG_VENDOR="coreboot toolchain v$CROSSGCC_VERSION $CROSSGCC_DATE - " \
		-DCMAKE_BUILD_TYPE=Release ../$LLVM_DIR || touch .failed
	$MAKE $JOBS || touch .failed
	$MAKE install || touch .failed

	cp -a ../$CFE_DIR/tools/scan-build/* $DESTDIR$TARGETDIR/bin
	cp -a ../$CFE_DIR/tools/scan-view/* $DESTDIR$TARGETDIR/bin

	# create symlinks to work around broken --print-librt-file-name
	# when used with -target.
	cd $DESTDIR$TARGETDIR/lib/clang/${CLANG_VERSION}/lib
	for i in */libclang_rt.builtins*.a; do
		ln -s $i .
	done
}

build_MAKE() {
	CC="$CC" CFLAGS="$HOSTCFLAGS" ../${MAKE_DIR}/configure --prefix=$TARGETDIR \
		--disable-nls || touch .failed
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	normalize_dirs
}

print_stable() {
	case "$PRINTSTABLE" in
		AUTOCONF|autoconf)  printf "%s\n" "$GCC_AUTOCONF_VERSION";;
		BINUTILS|binutils)  printf "%s\n" "$BINUTILS_VERSION";;
		CLANG|clang)  printf "%s\n" "$CLANG_VERSION";;
		EXPAT|expat)  printf "%s\n" "$EXPAT_VERSION";;
		GCC|gcc)  printf "%s\n" "$GCC_VERSION";;
		GDB|gdb)  printf "%s\n" "$GDB_VERSION";;
		GMP|gmp)   printf "%s\n" "$GMP_VERSION";;
		IASL|iasl) printf "%s\n" "$IASL_VERSION";;
		LIBELF|libelf)  printf "%s\n" "$LIBELF_VERSION";;
		MPC|mpc)  printf "%s\n" "$MPC_VERSION";;
		MPFR|mpfr)  printf "%s\n" "$MPFR_VERSION";;
		PYTHON|python)  printf "%s\n" "$PYTHON_VERSION";;
		MAKE|make)  printf "%s\n" "$MAKE_VERSION";;
		*) printf "Unknown tool %s\n" "$PRINTSTABLE";;
	esac
}

trap quit 1 2 3 15

# Look if we have getopt. If not, build it.
export PATH=$PATH:.
getopt - > /dev/null 2>/dev/null || gcc -o getopt getopt.c

# parse parameters.. try to find out whether we're running GNU getopt
getoptbrand="$(getopt -V | sed -e '1!d' -e 's,^\(......\).*,\1,')"
if [ "${getoptbrand}" = "getopt" ]; then
	# Detected GNU getopt that supports long options.
	args=$(getopt -l version,help,clean,directory:,bootstrap,platform:,languages:,package:,jobs:,destdir:,savetemps,scripting,ccache,supported:,urls,nocolor -o Vhcd:bp:l:P:j:D:tSys:un -- "$@")
	getopt_ret=$?
	eval set -- "$args"
else
	# Detected non-GNU getopt
	args=$(getopt Vhcd:bp:l:P:j:D:tSys:un $*)
	getopt_ret=$?
	set -- $args
fi

if [ $getopt_ret != 0 ]; then
	myhelp
	exit 1
fi

while true ; do
        case "$1" in
		-V|--version)	shift; myversion; exit 0;;
		-h|--help)	shift; myhelp; exit 0;;
		-c|--clean)	shift; clean=1;;
		-t|--savetemps)	shift; SAVETEMPS=1;;
		-d|--directory)	shift; TARGETDIR="$1"; shift;;
		-b|--bootstrap) shift; BOOTSTRAP=1;;
		-p|--platform)	shift; TARGETARCH="$1"; shift;;
		-l|--languages)	shift; LANGUAGES="$1"; shift;;
		-D|--destdir)	shift; DESTDIR="$1"; shift;;
		-j|--jobs)	shift; JOBS="-j $1"; shift;;
		-P|--package)   shift; PACKAGE="$1"; shift;;
		-S|--scripting) shift; SKIPPYTHON=0;;
		-y|--ccache)	shift; USECCACHE=1;;
		-s|--supported) shift; PRINTSTABLE="$1"; shift;;
		-u|--urls)	shift; printf "%s\n" "$ALL_ARCHIVES"; exit 0;;
		-n|--nocolor)	shift; \
			unset red RED green GREEN blue BLUE cyan CYAN NC;;
		--)		shift; break;;
		*)		break;;
	esac
done

if [ $# -gt 0 ]; then
	printf "Excessive arguments: $*\n"
	myhelp
	exit 1
fi

if [ -n "$PRINTSTABLE" ]; then
	print_stable
	exit 0
fi

#print toolchain builder version string as the header
printversion

case "$TARGETARCH" in
	x86_64-elf)		;;
	x86_64*)		TARGETARCH=x86_64-elf;;
	i386-elf)		;;
	i386-mingw32)		;;
	mipsel-elf)		;;
	riscv-elf)		TARGETARCH=riscv64-elf;;
	powerpc64*-linux*)	;;
	i386*)			TARGETARCH=i386-elf;;
	arm*)			TARGETARCH=arm-eabi;;
	aarch64*)		TARGETARCH=aarch64-elf;;
	nds32le-elf)		;;
	*)			printf "${red}WARNING: Unsupported architecture $TARGETARCH.${NC}\n\n"; ;;
esac

# Figure out which packages to build

case "$PACKAGE" in
	GCC|gcc)
		echo "Target architecture is now $TARGETARCH"
		NAME="${TARGETARCH} cross GCC"
		PACKAGES="GMP MPFR MPC LIBELF BINUTILS GCC"
		;;
	GDB|gdb)
		NAME="${TARGETARCH} cross GDB"
		if [ $SKIPPYTHON -eq 0 ]; then
			PACKAGES="EXPAT PYTHON GDB"
		else
			PACKAGES="EXPAT GDB"
		fi
		;;
	CLANG|clang)
		NAME=clang
		PACKAGES="LLVM CFE CRT CTE"
		CMAKE=$(searchtool cmake "cmake") || exit $?
		;;
	IASL|iasl)
		NAME="IASL ACPI compiler"
		PACKAGES=IASL
		;;
	MAKE|make)
		NAME="GNU Make"
		PACKAGES=MAKE
		;;
	*)
		printf "${red}ERROR: Unsupported package $PACKAGE. (Supported packages are GCC, GDB, CLANG, IASL, MAKE)${NC}\n\n";
		exit 1
		;;
esac

# Find all the required tools:

TAR=$(searchtool tar) || exit $?
PATCH=$(searchtool patch) || exit $?
MAKE=$(searchtool make) || exit $?
SHA1SUM=$(searchtool sha1sum)
#SHA512SUM=$(searchtool sha512sum)
#MD5SUM=$(searchtool md5sum)
CHECKSUM=$SHA1SUM
LBZIP2=$(searchtool lbzip2 "" nofail)
PIGZ=$(searchtool pigz "" nofail)

searchtool m4 > /dev/null
searchtool bison > /dev/null
searchtool flex flex > /dev/null
searchtool g++ "Free Software Foundation" nofail > /dev/null || \
searchtool clang "clang version" nofail > /dev/null || \
searchtool clang "LLVM" "" "g++" > /dev/null
searchtool wget > /dev/null
searchtool bzip2 "bzip2," > /dev/null

check_for_library "-lz" "zlib (zlib1g-dev or zlib-devel)"

CC=cc
check_cc

if [ "$HALT_FOR_TOOLS" -ne 0 ]; then
	exit 1
fi

# This initial cleanup is useful when updating the toolchain script.

if [ "$clean" = "1" ]; then
	cleanup
fi

# Set up host compiler and flags needed for various OSes

if is_package_enabled "GCC"; then
if [ $UNAME = "Darwin" ]; then
	#GCC_OPTIONS="$GCC_OPTIONS --enable-threads=posix"

	# generally the OS X compiler can create x64 binaries.
	# Per default it generated i386 binaries in 10.5 and x64
	# binaries in 10.6 (even if the kernel is 32bit)
	# For some weird reason, 10.5 autodetects an ABI=64 though
	# so we're setting the ABI explicitly here.
	if [ $(sysctl -n hw.optional.x86_64 2>/dev/null) -eq 1 ] 2>/dev/null; then
		OPTIONS="ABI=64"
	else
		OPTIONS="ABI=32"
	fi

	# In Xcode 4.5.2 the default compiler is clang.
	# However, this compiler fails to compile gcc 4.7.x. As a
	# workaround it's possible to compile gcc with llvm-gcc.
	if $CC -v 2>&1 | grep -q LLVM; then
		CC=llvm-gcc
	fi
elif [ $UNAME = "Linux" -o $UNAME = "Cygwin" ]; then
	# gmp is overeager with detecting 64bit CPUs even if they run
	# a 32bit kernel and userland.
	if [ "$(uname -m 2>/dev/null)" = "i686" ]; then
		OPTIONS="ABI=32"
	fi
elif [ $UNAME = "NetBSD" ]; then
	# same for NetBSD but this one reports an i386
	if [ "$(uname -m 2>/dev/null)" = "i386" ]; then
		OPTIONS="ABI=32"
	fi
fi
fi # GCC

export HOSTCFLAGS="-Os"
if have_hostcflags_from_gmp; then
	set_hostcflags_from_gmp
fi

if [ "$USECCACHE" = 1 ]; then
	CC="ccache $CC"
fi

# Prepare target directory for building GCC
# (dependencies must be in the PATH)
mkdir -p $DESTDIR$TARGETDIR/bin
mkdir -p $DESTDIR$TARGETDIR/share
export PATH=$DESTDIR$TARGETDIR/bin:$PATH

# Download, unpack, patch and build all packages

printf "Downloading tarballs ... \n"
mkdir -p tarballs
for P in $PACKAGES; do
	download $P
done
printf "Downloaded tarballs ... ${green}ok${NC}\n"

printf "Unpacking and patching ... \n"
for P in $PACKAGES; do
	unpack_and_patch $P || exit 1
done
printf "Unpacked and patched ... ${green}ok${NC}\n"

printf "Building packages ... \n"
for package in $PACKAGES; do
	build $package
done
printf "Packages built ... ${green}ok${NC}\n"

# Adding git information of current tree to target directory
# for reproducibility
PROGNAME=$(basename "$0")
rm -f "$DESTDIR$TARGETDIR/share/$PROGNAME-*"
cp "$PROGNAME" "$DESTDIR$TARGETDIR/share/$PROGNAME-$CROSSGCC_VERSION-$CROSGCC_COMMIT"

cleanup

printf "\n${green}You can now run your $NAME toolchain from $TARGETDIR.${NC}\n"